<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    </head>
    <body>
        <script>
            function person(firstname, lastname, age, eyecolor) {
                this.firstname = firstname;
                this.lastname = lastname;
                this.age = age;
                this.eyecolor = eyecolor;
            }
            myFather = new person("Bill", "Gates", 56, "blue");
            document.write(myFather.firstname + " is " + myFather.age + " years old.");
        </script>
    </body>
</html>